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Gigabeat Button/Backlight update: Reduce the number of writes to the sc606 when control registers are not changing. Fix up some buttonlight bugs. Add in full sc606 initialization during the backlight init.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13384 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Karl Kurbjun 2007-05-14 05:04:21 +00:00
parent 28903c353e
commit 9a90d557e4
1 changed files with 79 additions and 30 deletions
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109
firmware/target/arm/s3c2440/gigabeat-fx/backlight-meg-fx.c
View file

@ -25,15 +25,14 @@
#include "sc606-meg-fx.h" #include "sc606-meg-fx.h"
#include "power.h" #include "power.h"
#define FLICKER_PERIOD 15
#define BUTTONLIGHT_MENU (SC606_LED_B1) #define BUTTONLIGHT_MENU (SC606_LED_B1)
#define BUTTONLIGHT_ALL (SC606_LED_B1 | SC606_LED_B2 | SC606_LED_C1 | SC606_LED_C2) #define BUTTONLIGHT_ALL (SC606_LED_B1 | SC606_LED_B2 | SC606_LED_C1 | SC606_LED_C2)
static void led_control_service(void); static void led_control_service(void);
static unsigned short backlight_brightness; static unsigned char backlight_brightness;
static unsigned short buttonlight_brightness; static unsigned char buttonlight_brightness;
static unsigned short backlight_target; static unsigned char backlight_target;
static unsigned short buttonlight_target; static unsigned char buttonlight_target;
static enum backlight_states static enum backlight_states
{ {
@ -64,16 +63,20 @@ enum buttonlight_states
static unsigned short buttonlight_trigger_now; static unsigned short buttonlight_trigger_now;
#define CHARGING_LED_COUNT 60
unsigned char charging_leds[] = { 0x00, 0x20, 0x38, 0x3C };
bool __backlight_init(void) bool __backlight_init(void)
{ {
buttonlight_brightness=DEFAULT_BRIGHTNESS_SETTING; buttonlight_brightness = DEFAULT_BRIGHTNESS_SETTING;
backlight_brightness=DEFAULT_BRIGHTNESS_SETTING; backlight_brightness = DEFAULT_BRIGHTNESS_SETTING;
backlight_control = BACKLIGHT_CONTROL_IDLE;
buttonlight_control = BUTTONLIGHT_CONTROL_IDLE; buttonlight_control = BUTTONLIGHT_CONTROL_IDLE;
backlight_control = BACKLIGHT_CONTROL_ON;
/* Set the backlight up in a known state */
sc606_init();
sc606_write(SC606_REG_A , DEFAULT_BRIGHTNESS_SETTING);
sc606_write(SC606_REG_B , 0);
sc606_write(SC606_REG_C , 0);
sc606_write(SC606_REG_CONF , 0x03);
/* put the led control on the tick list */ /* put the led control on the tick list */
tick_add_task(led_control_service); tick_add_task(led_control_service);
@ -132,11 +135,6 @@ void __buttonlight_mode(enum buttonlight_mode mode)
} }
} }
/*
* The button lights have 'modes' of operation. Each mode must setup and
* execute its own operation - taking care that this is all done in an ISR.
*/
/* led_control_service runs in interrupt context - be brief! /* led_control_service runs in interrupt context - be brief!
* This service is called once per interrupt timer tick - 100 times a second. * This service is called once per interrupt timer tick - 100 times a second.
* *
@ -151,11 +149,11 @@ static void led_control_service(void)
{ {
static unsigned char static unsigned char
sc606regAval=DEFAULT_BRIGHTNESS_SETTING, sc606regAval=DEFAULT_BRIGHTNESS_SETTING,
sc606regBval=DEFAULT_BRIGHTNESS_SETTING, sc606regBval=0,
sc606regCval=DEFAULT_BRIGHTNESS_SETTING, sc606regCval=0,
sc606regCONFval=0x03; sc606regCONFval=0x03;
static bool sc606_changed=false; static bool sc606_changed=false, sc606_CONF_changed=false;
if(sc606_changed==false) if(sc606_changed==false)
{ {
@ -166,15 +164,21 @@ static void led_control_service(void)
break; break;
case BACKLIGHT_CONTROL_OFF: case BACKLIGHT_CONTROL_OFF:
sc606_changed=true; sc606_changed=true;
sc606_CONF_changed=true;
sc606regCONFval &= ~0x03; sc606regCONFval &= ~0x03;
sc606regAval=0;
backlight_control = BACKLIGHT_CONTROL_IDLE; backlight_control = BACKLIGHT_CONTROL_IDLE;
break; break;
case BACKLIGHT_CONTROL_ON: case BACKLIGHT_CONTROL_ON:
sc606_changed=true; sc606_changed=true;
sc606_CONF_changed=true;
sc606regCONFval |= 0x03; sc606regCONFval |= 0x03;
sc606regAval=backlight_brightness;
backlight_control = BACKLIGHT_CONTROL_IDLE; backlight_control = BACKLIGHT_CONTROL_IDLE;
break; break;
case BACKLIGHT_CONTROL_SET: case BACKLIGHT_CONTROL_SET:
if(!(sc606regCONFval&0x03))
break;
sc606_changed=true; sc606_changed=true;
sc606regAval=backlight_brightness; sc606regAval=backlight_brightness;
backlight_control = BACKLIGHT_CONTROL_IDLE; backlight_control = BACKLIGHT_CONTROL_IDLE;
@ -187,22 +191,29 @@ static void led_control_service(void)
break; break;
} }
sc606_changed=true; sc606_changed=true;
sc606regCONFval |= 0x03; if(!(sc606regCONFval&0x03))
{
sc606_CONF_changed=true;
sc606regCONFval |= 0x03;
}
if(backlight_target>sc606regAval) if(backlight_target>sc606regAval)
{ {
sc606regAval++; sc606regAval++;
if(backlight_target==sc606regAval) if(backlight_target==sc606regAval)
backlight_control = BACKLIGHT_CONTROL_ON; backlight_control = BACKLIGHT_CONTROL_IDLE;
} }
else else
{ {
sc606regAval--; sc606regAval--;
if(backlight_target==sc606regAval) if(sc606regAval==0)
backlight_control = BACKLIGHT_CONTROL_OFF; backlight_control = BACKLIGHT_CONTROL_OFF;
else if (backlight_target==sc606regAval)
backlight_control = BACKLIGHT_CONTROL_IDLE;
} }
break; break;
default: default:
backlight_control = BACKLIGHT_CONTROL_IDLE;
break; break;
} }
switch (buttonlight_control) switch (buttonlight_control)
@ -212,45 +223,56 @@ static void led_control_service(void)
break; break;
case BUTTONLIGHT_CONTROL_OFF: case BUTTONLIGHT_CONTROL_OFF:
sc606_changed=true; sc606_changed=true;
sc606regCONFval &= ~0x3C; sc606_CONF_changed=true;
sc606regCONFval &= ~BUTTONLIGHT_ALL;
sc606regBval=sc606regCval=0; sc606regBval=sc606regCval=0;
buttonlight_control=BUTTONLIGHT_CONTROL_IDLE; buttonlight_control=BUTTONLIGHT_CONTROL_IDLE;
break; break;
case BUTTONLIGHT_CONTROL_ON: case BUTTONLIGHT_CONTROL_ON:
sc606_changed=true; sc606_changed=true;
sc606regCONFval |= 0x3C; sc606_CONF_changed=true;
sc606regCONFval |= BUTTONLIGHT_ALL;
sc606regBval=sc606regCval=buttonlight_brightness; sc606regBval=sc606regCval=buttonlight_brightness;
buttonlight_control=BUTTONLIGHT_CONTROL_IDLE; buttonlight_control=BUTTONLIGHT_CONTROL_IDLE;
break; break;
case BUTTONLIGHT_CONTROL_SET: case BUTTONLIGHT_CONTROL_SET:
if(!(sc606regCONFval&BUTTONLIGHT_ALL))
break;
sc606_changed=true; sc606_changed=true;
sc606regBval=sc606regCval=buttonlight_brightness; sc606regBval=sc606regCval=buttonlight_brightness;
buttonlight_control = BUTTONLIGHT_CONTROL_IDLE; buttonlight_control = BUTTONLIGHT_CONTROL_IDLE;
break; break;
case BUTTONLIGHT_CONTROL_FADE: case BUTTONLIGHT_CONTROL_FADE:
/* Was this mode set while the button light is already on/off? */ /* Was this mode set while the button light is already on? */
if(buttonlight_target==sc606regBval) if(buttonlight_target==sc606regBval)
{ {
buttonlight_control = BUTTONLIGHT_CONTROL_IDLE; buttonlight_control = BUTTONLIGHT_CONTROL_IDLE;
break; break;
} }
sc606_changed=true; sc606_changed=true;
sc606regCONFval |= 0x3C; if(!(sc606regCONFval&BUTTONLIGHT_ALL))
{
sc606_CONF_changed=true;
sc606regCONFval |= BUTTONLIGHT_ALL;
}
if(buttonlight_target>sc606regBval) if(buttonlight_target>sc606regBval)
{ {
sc606regCval=++sc606regBval; sc606regCval=++sc606regBval;
if(buttonlight_target==sc606regBval) if(buttonlight_target==sc606regBval)
buttonlight_control = BUTTONLIGHT_CONTROL_ON; buttonlight_control = BUTTONLIGHT_CONTROL_IDLE;
} }
else else
{ {
sc606regCval=--sc606regBval; sc606regCval=--sc606regBval;
if(sc606regBval==0) if(sc606regBval==0)
buttonlight_control = BUTTONLIGHT_CONTROL_OFF; buttonlight_control = BUTTONLIGHT_CONTROL_OFF;
else if (buttonlight_target==sc606regBval)
backlight_control = BACKLIGHT_CONTROL_IDLE;
} }
break; break;
default: default:
buttonlight_control = BUTTONLIGHT_CONTROL_IDLE;
break; break;
} }
} }
@ -263,28 +285,55 @@ static void led_control_service(void)
else else
sc606_control=SC606_CONTROL_IDLE; sc606_control=SC606_CONTROL_IDLE;
break; break;
case SC606_CONTROL_A12: case SC606_CONTROL_A12:
sc606_write(SC606_REG_A , sc606regAval); sc606_write(SC606_REG_A , sc606regAval);
sc606_control=SC606_CONTROL_B12; sc606_control=SC606_CONTROL_B12;
break; break;
case SC606_CONTROL_B12: case SC606_CONTROL_B12:
sc606_write(SC606_REG_B , sc606regBval); sc606_write(SC606_REG_B , sc606regBval);
sc606_control=SC606_CONTROL_C12; sc606_control=SC606_CONTROL_C12;
break; break;
case SC606_CONTROL_C12: case SC606_CONTROL_C12:
sc606_write(SC606_REG_C , sc606regCval); sc606_write(SC606_REG_C , sc606regCval);
sc606_control=SC606_CONTROL_CONF; if(sc606_CONF_changed!=true)
{
sc606_changed=false;
if(backlight_control != BACKLIGHT_CONTROL_IDLE ||
buttonlight_control != BUTTONLIGHT_CONTROL_IDLE)
{
sc606_control=SC606_CONTROL_A12;
}
else
{
sc606_control=SC606_CONTROL_IDLE;
}
}
else
{
sc606_control=SC606_CONTROL_CONF;
}
break; break;
case SC606_CONTROL_CONF: case SC606_CONTROL_CONF:
sc606_write(SC606_REG_CONF , sc606regCONFval); sc606_write(SC606_REG_CONF , sc606regCONFval);
sc606_changed=false; sc606_changed=false;
if(backlight_control != BACKLIGHT_CONTROL_IDLE && buttonlight_control != BUTTONLIGHT_CONTROL_IDLE) sc606_CONF_changed=false;
if(backlight_control != BACKLIGHT_CONTROL_IDLE ||
buttonlight_control != BUTTONLIGHT_CONTROL_IDLE)
{
sc606_control=SC606_CONTROL_A12; sc606_control=SC606_CONTROL_A12;
}
else else
{
sc606_control=SC606_CONTROL_IDLE; sc606_control=SC606_CONTROL_IDLE;
}
break; break;
default: default:
sc606_control=SC606_CONTROL_A12; sc606_control=SC606_CONTROL_IDLE;
break; break;
} }